Fisherbrand™ Grade 601 General Purpose Filter Papers
A filter paper used in analytical works in laboratories with medium filtration velocity.
Cytiva Whatman™ Qualitative Filter Paper: Grade 1 Circles
Covers a wide range of laboratory applications and is frequently used for clarifying liquids. Whatman™ Qualitative Filter Paper: Grade 1 Circles are widely used standard grade filter papers for routine applications with medium retention and flow rates.
Cytiva Whatman™ Quantitative Filter Paper: Grade 541 Circles
Recommended when fast filtration of a gelatinous precipitate for gravimetric analysis is performed on a strongly acidic or alkali solution. Whatman™ Quantitative Filter Paper: Grade 541 Circles are acid hardened cellulose filters, which reduces ash to an extremely low level.
Cytiva Whatman™ Qualitative Filter Paper: Grade 4 Circles
Filters and retains course particles for monitoring air pollution. Whatman™ Qualitative Filter Paper: Grade 4 Circles are used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.
Cytiva Whatman™ Qualitative Filter Paper: Grade 2 Circles
Retains and absorbs more than Grade 1 filters, with a corresponding increase in filtration time. Whatman™ Qualitative Filter Paper: Grade 2 Circles are used for monitoring specific contaminants in the atmosphere and in soil testing.
Fisherbrand™ Grade 113 Cellulose Medium Filtering Qualitative Filter Paper
Filters fine particulates.
Cytiva Whatman™ Kjeldahl Analysis Weighing Paper, Grade B-2
Dissolves residue-free in acid solution, which is critical in applications such as Kjeldahl analysis of nitrogen in soil. Whatman Kjeldahl Analysis Weighing Paper, Grade B-2 is thin, lightweight, and low in nitrogen for accurate chemical analysis.
Fisherbrand™ Grade 601 Cellulose General Purpose Filter Paper
Used in analytical works in laboratories. Fisherbrand™ Grade 601 Cellulose General Purpose Filter Paper has medium filtration velocity.
Cytiva Whatman™ Quantitative Filter Paper: Grade 41 Circles
Use for quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates or for quantitative air pollution analysis. Whatman™ Quantitative Filter Paper: Grade 41 Circles are commonly used in preparing samples for metal analysis after nitric acid digestion.
Cytiva Whatman™ Quantitative Filter Paper: Grade 42 Circles
Filters and retains extremely small particles. Whatman™ Quantitative Filter Paper: Grade 42 Circles are suitable for processes that require ashing.
Fisherbrand™ Grade 115 Cellulose Very Slowly Filtering Qualitative Filter Paper
Fisherbrand™ Grade 115 Cellulose Very Slowly Filtering Qualitative Filter Paper are made of cellulose fibers.
Cytiva Whatman™ Qualitative Filter Papers: Grade 2555½ Pleated Circles
Maintains flow rate with reduced contact between filter and funnel. Whatman™Grade 2555½ Pleated Circles are medium fast filter papers used for the filtration of the mash for the determination of the extract in malt and wort and for removing carbon dioxide from beer.
Fisherbrand™ Grade 13 Ashless Medium Filtering Quantitative Filter Paper
Used for fine precipitates such as magnesium ammonium phosphate and calcium oxalate.
Cytiva Whatman™ Qualitative Filter Paper: Grade 5 Circles
Retains the fine precipitates encountered in chemical analysis. Whatman™ Qualitative Filter Paper - Grade 5 Circles are excellent clarifying filters for cloudy suspensions and for water and soil analysis.
Cytiva Whatman™ Quantitative Filter Paper: Grade 40 Circles
Supports accurate analysis in applications sensitive to very low levels of background contamination. Whatman™ Quantitative Filter Paper: Grade 40 Circles are additionally useful in gravimetric analysis where ash content might affect weight measurements of combusted samples.
Cytiva Whatman™ Grade 54 Quantitative Filter Paper
Supports collection of coarse and gelatinous precipitates with minimal fiber shredding, even when wet. Whatman™ Grade 54 Quantitative Filter Paper has a hard, smooth surface to sustain vacuum and suction filtration.
Cytiva Whatman™ Qualitative Filter Papers - Prepleated Grade 113V
Savings in time required to quadrant-fold circles to fit conical filter funnels in repetitive or multiple analyses
Cytiva Whatman™ Qualitative Grade Plain Circles and Sheets - Grade 3
Used for high precipitate capacity and increased wet strength. Whatman™ Qualitative Grade Plain Circles and Sheets - Grade 3 provide double the thickness of Whatman Grade 1.
Cytiva Whatman™ Quantitative Filter Papers: Grade 542 Circles
Enables high retention of fine particles in chemically harsh conditions. Whatman™ Quantitative Filter Papers: Grade 542 Circles are well suited for use in capturing fine precipitates in applications such as metal determinations and hydroxide collection.
Cytiva Whatman™ Qualitative Filter Paper: Grade 1 Sheets
Covers a wide range of laboratory applications and is frequently used for clarifying liquids. Whatman™ Qualitative Filter Paper: Grade 1 Sheets are widely used standard grade filter paper for routine applications with medium retention and flow rates.
Cytiva Whatman™ Qualitative Filter Paper: Grade 6 Circles
Filters particles twice as fast as Whatman Qualitative Filter Paper Grade 5. Whatman™ Qualitative Grade 6 Filters provide fine particle retention for boiler water analysis.
Cytiva Whatman™ Grade 1 Qualitatitve Filter Paper
Provides medium retention and flow rate. Whatman™ Grade 1 Qualitative Filter Paper is frequently used in clarifying liquids, soil analysis and seed testing procedures.
Macherey-Nagel™ MN 713 Grade Filter Paper, Folded
Cover tables, benchtops and shelves to absorb spilled/splashed liquids. Macherey-Nagel™ MN 713 Grade Filter Paper, Folded is a smooth, thick technical filter paper with medium filtration speed for use in general lab applications and to protect surfaces from a range of substances.
Cytiva Whatman™ Grade 52 Quantitative Filter Paper
Enables efficient precipitate recovery with acid-hardened surface and low ash content. Whatman™ Grade 52 Quantitative Filter Paper prevents fiber shredding during vacuum filtration or precipitate collection.
Cytiva Grade GF/A Filter for Personal Air Samplers
These aerosol sampling and particulate monitoring filters provide high flow rates and minimal sample interference. Cytiva Whatman Grade GF/A card-mounted filters are used in static sample and personal air sampler applications.
Cytiva Whatman™ Cellulose Nitrate Membrane Filters
Manufactured under strictly controlled conditions. Whatman™ Cellulose Nitrate Membrane Filters have a noticeably improved flexibility and are made to tolerate abuse during handling, loading, and autoclaving without sacrificing integrity.
Fisherbrand™ Grade 122 Cellulose General Purpose Filter Paper
Very fast filtration velocity. Fisherbrand™ Grade 122 Cellulose General Purpose Filter Paper is used for all general works in laboratories.
Cytiva Whatman™ Quantitative Filter Paper: Grade 589/1 Circles
Designed for fast filtration of coarse precipitate. Whatman™ Grade 589/1 Quantitatve FIlter Paper Circles support tests such as cement fineness measurement in a standard Blaine test or determination of the ash content in foodstuffs.
Cytiva Whatman™ Quantitative Filter Paper: Grade 540 Circles
Use as a gravimetric filter during analysis of metals in acidic or alkaline solutions and in the collection of hydroxides. Whatman™ Quantitative Filter Paper: Grade 540 Circles acid-treated surface prevents tearing during filtration and allows the user to scrape precipitates from the paper.
Filter papers are familiar consumables in the laboratory normally used with a conical funnel or similar device for the filtering and retention of solids, particulates and other contaminants from aqueous solutions, suspensions, solvents and other liquids. Filter papers are manufactured from natural cellulose linters or from glass or quartz fibres. They are available in various diameters as pre-cut plain circles, or as discs ready-folded into pleats, quadrants or pyramids for convenience and to maintain optimal, clog-free flow rates. Filter paper is also sold as sheets or rolls that can be cut to size as required.
Filter papers are described either as qualitative or quantitative. Qualitative filter papers are used for general purpose filtration applications where subsequent analytical outcomes are not critical.
Quantitative filter papers (ashless papers), are intended for more exacting analytical work. They are made from low-linting fibres that are typically acid-hardened during their manufacture to give high wet strength and chemical resistance, and are pre-rinsed with demineralised water for extra purity.
Most filter paper is also graded numerically according to pore size, which in turn infers other parameters such as flow rate, retention, thickness, weight, burst strength, and hence their nominal application.
What is filter paper used for?
- General applications in research laboratories, clinics and education
- In the analytical laboratory for removal of precipitants and particulates prior to further analysis or assay
- Industrial applications in foods, beverages, cosmetics and gravimetric analysis of cements, clays, iron and steel products
- Environmental analysis of water, soil or atmospheric samples